;;;; encoding-iso88591.test --- test suite for Guile's string encodings    -*- mode: scheme; coding: iso-8859-1 -*-
;;;;
;;;; Copyright (C) 2009, 2010 Free Software Foundation, Inc.
;;;;
;;;; This library is free software; you can redistribute it and/or
;;;; modify it under the terms of the GNU Lesser General Public
;;;; License as published by the Free Software Foundation; either
;;;; version 3 of the License, or (at your option) any later version.
;;;;
;;;; This library is distributed in the hope that it will be useful,
;;;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
;;;; Lesser General Public License for more details.
;;;;
;;;; You should have received a copy of the GNU Lesser General Public
;;;; License along with this library; if not, write to the Free Software
;;;; Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

(define-module (test-strings)
  #:use-module (test-suite lib)
  #:use-module (srfi srfi-1))

;; Create a string from integer char values, eg. (string-ints 65) => "A"
(define (string-ints . args)
  (apply string (map integer->char args)))

;; Set locale to the environment's locale, so that the prints look OK.
(define oldlocale #f)
(if (defined? 'setlocale)
    (set! oldlocale (setlocale LC_ALL "")))

(define ascii-a (integer->char 65))     ; LATIN CAPITAL LETTER A
(define a-acute (integer->char #x00c1)) ; LATIN CAPITAL LETTER A WITH ACUTE
(define alpha (integer->char #x03b1))   ; GREEK SMALL LETTER ALPHA
(define cherokee-a (integer->char #x13a0)) ; CHEROKEE LETTER A

(with-test-prefix "characters"
  (pass-if "input A"
    (char=? ascii-a #\A))

  (pass-if "input A acute"
    (char=? a-acute #\�))

  (pass-if "display A"
           (let ((pt (open-output-string)))
             (set-port-encoding! pt "ISO-8859-1")
             (set-port-conversion-strategy! pt 'escape)
             (display ascii-a pt)
             (string=? "A"
                       (get-output-string pt))))

  (pass-if "display A acute"
           (let ((pt (open-output-string)))
             (set-port-encoding! pt "ISO-8859-1")
             (set-port-conversion-strategy! pt 'escape)
             (display a-acute pt)
             (string=? "�"
                       (get-output-string pt))))

  (pass-if "display alpha"
           (let ((pt (open-output-string)))
             (set-port-encoding! pt "ISO-8859-1")
             (set-port-conversion-strategy! pt 'escape)
             (display alpha pt)
             (string-ci=? "\\u03b1"
                       (get-output-string pt))))

  (pass-if "display Cherokee a"
           (let ((pt (open-output-string)))
             (set-port-encoding! pt "ISO-8859-1")
             (set-port-conversion-strategy! pt 'escape)
             (display cherokee-a pt)
             (string-ci=? "\\u13a0"
                       (get-output-string pt))))

  (pass-if "write A"
           (let ((pt (open-output-string)))
             (set-port-encoding! pt "ISO-8859-1")
             (set-port-conversion-strategy! pt 'escape)
             (write ascii-a pt)
             (string=? "#\\A"
                       (get-output-string pt))))

  (pass-if "write A acute"
           (let ((pt (open-output-string)))
             (set-port-encoding! pt "ISO-8859-1")
             (set-port-conversion-strategy! pt 'escape)
             (write a-acute pt)
             (string=? "#\\�"
                       (get-output-string pt))))

  (pass-if "write A followed by combining accent"
           (let ((pt (open-output-string)))
             (set-port-encoding! pt "ISO-8859-1")
             (set-port-conversion-strategy! pt 'escape)
             (write (string #\A (integer->char #x030f)) pt)
             (string-ci=? "\"A\\u030f\""
                          (get-output-string pt)))))


(define s1 "�ltima")
(define s2 "c�dula")
(define s3 "a�os")
(define s4 "�C�mo?")

(with-test-prefix "string length"

  (pass-if "�ltima"
	   (eq? (string-length s1) 6))
    
  (pass-if "c�dula"
	   (eq? (string-length s2) 6))

  (pass-if "a�os"
	   (eq? (string-length s3) 4))

  (pass-if "�C�mo?"
	   (eq? (string-length s4) 6)))

(with-test-prefix "internal encoding"

  (pass-if "�ltima"
	   (string=? s1 (string-ints #xfa #x6c #x74 #x69 #x6d #x61)))

  (pass-if "c�dula"
	   (string=? s2 (string-ints #x63 #xe9 #x64 #x75 #x6c #x61)))

  (pass-if "a�os"
	   (string=? s3 (string-ints #x61 #xf1 #x6f #x73)))
 
  (pass-if "�C�mo?"
	   (string=? s4 (string-ints #xbf #x43 #xf3 #x6d #x6f #x3f))))

(with-test-prefix "chars"
 
  (pass-if "�ltima"
	   (list= eqv? (string->list s1)
		  (list #\� #\l #\t #\i #\m #\a)))
  
  (pass-if "c�dula"
	   (list= eqv? (string->list s2)
		  (list #\c #\� #\d #\u #\l #\a)))

  (pass-if "a�os"
	   (list= eqv? (string->list s3)
		  (list #\a #\� #\o #\s)))

  (pass-if "�C�mo?"
	   (list= eqv? (string->list s4)
		  (list #\� #\C #\� #\m #\o #\?))))

(with-test-prefix "symbols == strings"

  (pass-if "�ltima"
	   (eq? (string->symbol s1) '�ltima))

  (pass-if "c�dula"
	   (eq? (string->symbol s2) 'c�dula))

  (pass-if "a�os"
	   (eq? (string->symbol s3) 'a�os))
 
  (pass-if "�C�mo?"
	   (eq? (string->symbol s4) '�C�mo?)))

(with-test-prefix "non-ascii variable names"

  (pass-if "1"
	   (let ((� 1)
		 (� 2))
	     (eq? (+ � �) 3))))

(with-test-prefix "output errors"

  (pass-if-exception "char 256" exception:encoding-error
		     (let ((pt (open-output-string)))
		       (set-port-encoding! pt "ISO-8859-1")
		       (set-port-conversion-strategy! pt 'error)
		       (display (string-ints 256) pt))))

;; Reset locales
(if (defined? 'setlocale)
    (setlocale LC_ALL oldlocale))
